Khan Academy: What Makes a Computer, a Computer?

Learn about some of the different computer file types.

Pupils draw a picture of what they think a computer looks like inside. They learn the function of each part of a computer, the definitions of unfamiliar computer terms, and complete a worksheet of definitions of computer parts.

Computers are amazingly powerful machines that we have come to take for granted. Starting with a simple click of the mouse, this animated video takes you on a trip through the inner workings of computers. Learn how programs allow the...

This video explains why RSA, the public-key cryptosystem that is used for safe data transmission, is needed. This video lesson from Khan Academy is intended for students who are taking an introductory computer science course.

Some practice problems with data and graph representation in computer science.

A broad introduction to Information theory of computer science. [3:26]

Each computer receives input from a variety of devices, processes that data with the CPU and memory, and sends results to some form of output. This diagram visualizes that flow.

What is the limit of computer memory? [5:23]

This Khan article explains how to write your own 3D graphics engine with some trigonometry!

A button is an area that you click on a webpage to make something happen. This article is an introduction to buttons and provides example programs to see how they use buttons.